Rotary cutting knife



FIG. 1 is a perspective view of the rotary cutting knife;

FIG. 2 is a front view of the rotary cutting knife;

FIG. 3 is a rear view of the rotary cutting knife;

FIG. 4 is a left side view of the rotary cutting knife;

FIG. 5 is a right side view of the rotary cutting knife;

FIG. 6 is a top view of the rotary cutting knife; and,

FIG. 7 is a bottom view of the rotary cutting knife.

The broken lines depict portions of the rotary cutting knife in which the design is embodied that are not considered part of the claimed design. 

CLAIM The ornamental design for a rotary cutting knife, as shown and described. 